ok i have been trying to run a dedicated server for about 2 weeks now ill run it and ill be able to join it when i go to ut2004.exe>join_game>LAN then i click join there but it does not show up on the main server list

(im using windows 7)
yes i have downloaded the servercdkey.reg and when i doubleclick it it says
cannot import C:\Users\*******\desktop\UT2004_Server_CD_Key.reg the specified file is not a registry script.
you can only import binary registry files from within the registry editor

i have tried going to regedit and inserting it manually but there is already a CDKEy and when i change it i cant run ut2004 because it changes my cdkey so please help me out